Why change in ExecutionLogDaysKept value doesn't reflect in ExecutionLogStorage table on ReportServer Database?

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SQL

SSRS

Hello,

Before:
There is data older then 120 days


I have tried changing value of ExecutionLogDaysKept as follows:

UPDATE ConfigurationInfo SET Value = '90' WHERE   Name = 'ExecutionLogDaysKept'

I then restarted all SQL related services and tried checking data in ExecutionLogStorage Table of ReportServer DB.

After:
No Change
Expected(Data Older then 90 days would be cleared)

can anyone please help me with it?

Do I need to follow some steps to clear data from ExecutionLogStorage Table automatically?
Any help would greatly be appreciated.

Thanks,
Hitesh Varde,
Software Engineer